Admin saving to _posts in root instead of custom collection folder collections_dir

[ADTC]

Description:

When editing posts which have been moved to the custom collections directory, as defined by collections_dir in _config.yml Admin deletes the file in the custom_collection_dir/_posts folder and creates it in the _posts folder (in root).

Tell us a bit about yourself:

• jekyll (4.3.2)
• jekyll-admin (0.11.1)
• Node v20.1.0
• macOS Ventura M1
• Firefox latest

Steps to reproduce:

1. Add the configuration to _config.yml for custom collection folder.
2. As per instruction, move the _posts folder in custom collection directory.
3. Reload bundle exec jekyll serve
4. Open admin and make any change in a post. Save the changes.
5. Check the result in the file structure (done best if you have a Git repo tracking changes).

I expected the following:

Changes should be saved to the custom collection directory.

But got the following, instead:

Changes saved to a new file (in a subfolder) in root directory, with the file in custom collection directory deleted.

Other details:

Related: #449

[vcavallo]

I'm running into this now as well. Oddly, it didn't happen for me until after I added additional collections and starting messing with default frontmatter. I can't tell what caused it to start.

It only happens on Edit. Creation of new items lands them where they're supposed to go.

This is a breaking bug for me

2024-05-31 13:33:59 - NoMethodError - undefined method `to_api' for nil:NilClass:
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/jekyll-admin-0.11.1/lib/jekyll-admin/server/collections.rb:37:in `block (2 levels) in <class:Server>'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1697:in `call'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1697:in `block in compile!'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1030:in `block (3 levels) in route!'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1049:in `route_eval'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1030:in `block (2 levels) in route!'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1078:in `block in process_route'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1076:in `catch'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1076:in `process_route'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1028:in `block in route!'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1025:in `each'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1025:in `route!'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1147:in `block in dispatch!'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1119:in `block in invoke'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1119:in `catch'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1119:in `invoke'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1142:in `dispatch!'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:956:in `block in call!'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1119:in `block in invoke'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1119:in `catch'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1119:in `invoke'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:956:in `call!'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:945:in `call'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/rack-protection-2.2.4/lib/rack/protection/xss_header.rb:18:in `call'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/rack-protection-2.2.4/lib/rack/protection/path_traversal.rb:16:in `call'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/rack-protection-2.2.4/lib/rack/protection/json_csrf.rb:26:in `call'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/rack-protection-2.2.4/lib/rack/protection/base.rb:50:in `call'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/rack-protection-2.2.4/lib/rack/protection/base.rb:50:in `call'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/rack-protection-2.2.4/lib/rack/protection/frame_options.rb:31:in `call'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/rack-2.2.9/lib/rack/null_logger.rb:11:in `call'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/rack-2.2.9/lib/rack/head.rb:12:in `call'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:218:in `call'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:2004:in `call'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1564:in `block in call'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1780:in `synchronize'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/sinatra-2.2.4/lib/sinatra/base.rb:1564:in `call'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/rack-2.2.9/lib/rack/handler/webrick.rb:95:in `service'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/webrick-1.8.1/lib/webrick/httpserver.rb:140:in `service'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/webrick-1.8.1/lib/webrick/httpserver.rb:96:in `run'
        /home/vcavallo/.rbenv/versions/3.0.0/lib/ruby/gems/3.0.0/gems/webrick-1.8.1/lib/webrick/server.rb:310:in `block in start_thread'